Asymmetrical ZVS-PWM Half-Bridge-Type Switched-Capacitor DC-DC Converter Isolated with Peak Voltage Equal to Vin/2 Switch

Angélica Paula Caús; Ivo Barbi

doi:10.18618/REP.2022.1.0031

Authors

Angélica Paula Caús Instituto Brasileiro de Eletrônica de Potência e Energias Renováveis - IBEPE - UFSC, Florianópolis - SC, Brasil
Ivo Barbi Instituto Brasileiro de Eletrônica de Potência e Energias Renováveis - IBEPE - UFSC, Florianópolis - SC, Brasil

DOI:

https://doi.org/10.18618/REP.2022.1.0031

Keywords:

Asymmetrical dc-dc converter, isolated, Pulse Width Modulation, Switched capacitor, Zero-Voltage-Switching

Abstract

This paper presents a new power converter topology generated by the integration of the asymmetrical ZVS-PWM dc-dc converter with a switched-capacitor ladder-type commutation cell. Circuit operation and theoretical analysis with emphasis on the soft-commutation process are included in the paper. The main advantage of the proposed converter with respect to the conventional asymmetrical half-bridge dc-dc converter is the reduction of the voltage stress across the power switches to the half of the input dc bus voltage, enabling the utilization of lower voltage rating components. Experiments conducted on a laboratory prototype with 1.4 kW power-rating, 800 V input voltage, 48 V output voltage and 100 kHz switching frequency are included to verify the theoretical analysis and the design methodology. The maximum efficiency of the experimental non-optimized prototype was 93.6%.

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Author Biographies

Angélica Paula Caús, Instituto Brasileiro de Eletrônica de Potência e Energias Renováveis - IBEPE - UFSC, Florianópolis - SC, Brasil

was born in Rondinha, Brazil, She received the B.S. degree in electrical engineering from the University of Passo Fundo (UPF), Passo Fundo, Brazil, in 2018, and the M.S. degree in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 2020. She is currently a PhD student in Electrical Engineering at UFSC, in the Power Electronics and Electrical Drives area.

Ivo Barbi, Instituto Brasileiro de Eletrônica de Potência e Energias Renováveis - IBEPE - UFSC, Florianópolis - SC, Brasil

was born in Gaspar, Brazil. He received the B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, Brazil, in 1973 and 1976, respectively, and the Dr.Ing. degree in electrical engineering from the Institut National Polytechnique de Toulouse (INPT), Toulouse, France, in 1979. He founded the Brazilian Power Electronics Society (SOBRAEP), the Brazilian Power Electronics Conference (COBEP), in 1990, and the Brazilian Power Electronics and Renewable Energy Institute (IBEPE), in 2016. He is currently a Researcher with the Solar Energy Research Center and a Professor Emeritus in electrical engineering with UFSC. Prof. Barbi received the 2020 IEEE William E. Newell Power Electronics Award. He serves as an Associate Editor for the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS and the IEEE TRANSACTIONS ON POWER ELECTRONICS for several years.

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